/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.ranger.authorization.hbase;

import org.apache.hadoop.hbase.client.RegionInfo;
import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;
import org.apache.hadoop.hbase.security.access.Permission.Action;
import org.apache.hadoop.hbase.util.Bytes;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class HbaseAuthUtilsImpl implements HbaseAuthUtils {
    private static final Logger LOG = LoggerFactory.getLogger(HbaseAuthUtilsImpl.class.getName());

    @Override
    public String getAccess(Action action) {
        switch (action) {
            case READ:
                return ACCESS_TYPE_READ;
            case WRITE:
                return ACCESS_TYPE_WRITE;
            case CREATE:
                return ACCESS_TYPE_CREATE;
            case ADMIN:
                return ACCESS_TYPE_ADMIN;
            case EXEC:
                return ACCESS_TYPE_EXECUTE;
            default:
                return action.name().toLowerCase();
        }
    }

    @Override
    public String getActionName(String access) {
        switch (access) {
            case ACCESS_TYPE_READ:
                return Action.READ.name();
            case ACCESS_TYPE_WRITE:
                return Action.WRITE.name();
            case ACCESS_TYPE_CREATE:
                return Action.CREATE.name();
            case ACCESS_TYPE_ADMIN:
                return Action.ADMIN.name();
            case ACCESS_TYPE_EXECUTE:
                return Action.EXEC.name();
            default:
                return access.toUpperCase();
        }
    }

    @Override
    public boolean isReadAccess(String access) {
        return getAccess(Action.READ).equals(access);
    }

    @Override
    public boolean isWriteAccess(String access) {
        return getAccess(Action.WRITE).equals(access);
    }

    @Override
    public boolean isExecuteAccess(String access) {
        return getAccess(Action.EXEC).equals(access);
    }

    @Override
    public String getTable(RegionCoprocessorEnvironment regionServerEnv) {
        RegionInfo hri          = regionServerEnv.getRegion().getRegionInfo();
        byte[]     tableName    = hri.getTable().getName();
        String     tableNameStr = Bytes.toString(tableName);

        LOG.debug("getTable: Returning tableName[{}]", tableNameStr);

        return tableNameStr;
    }
}
